I understand this because a lot of people do so willy nilly. However, it can be done, and with far better health and nutrition than commercially prepared feeds. One important caveat, you must find an agricultural feed testing service (some local universities can do this) and have your feed lots tested and this can often be done by the target species, chicken, duck, dog, cow, whatever. I've been making my own feed for numerous species using only whole foods, no added vitamin/mineral premixes. It does take a lot of time, research and correct calculations, but I have been doing this for 40 years...I am NOT a fan of make at home feeds.
I'm guessing that you have at your fingertips a feed calculator, can you share a link to such a thing
